PHP 개발 시 민감한 데이터 및 개인정보 보호를 처리하는 방법

<?php
$url = "https://www.example.com";
$data = array("username" => "user", "password" => "pass");

$options = array(
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => $data,
);

$curl = curl_init($url);
curl_setopt_array($curl, $options);
$response = curl_exec($curl);
curl_close($curl);

echo $response;
?>

<?php
$iv = openssl_random_pseudo_bytes(16); // 生成随机的初始化向量
$key = "xvWDvGygtnnyrJFL"; // 密钥，保持足够长和复杂

$data = "sensitive data";
$encryptedData = openssl_encrypt($data, "AES-256-CBC", $key, OPENSSL_RAW_DATA, $iv);

$decryptedData = openssl_decrypt($encryptedData, "AES-256-CBC", $key, OPENSSL_RAW_DATA, $iv);

echo "原始数据: " . $data . "<br>";
echo "加密后的数据: " . base64_encode($encryptedData) . "<br>";
echo "解密后的数据: " . $decryptedData . "<br>";
?>

<?php
$password = "password123";
$hashedPassword = password_hash($password, PASSWORD_DEFAULT);

echo "原始密码: " . $password . "<br>";
echo "加密后的密码: " . $hashedPassword . "<br>";

$isValidPassword = password_verify($password, $hashedPassword);
if ($isValidPassword) {
    echo "密码验证成功！";
} else {
    echo "密码验证失败！";
}
?>

<?php
// 检查用户是否登录
session_start();
if (!isset($_SESSION['username'])) {
    header("Location: login.php");
    exit;
}

// 验证用户权限
$allowedUsers = array("admin", "user1", "user2"); // 具有权限的用户列表
$username = $_SESSION['username'];

if (!in_array($username, $allowedUsers)) {
    die("没有访问权限！");
}

// 显示敏感数据
echo "敏感数据......";
?>